Technically, this should do,
https://www.diodes.com/design/support/packaging/diodes-packaging/diodes-package-outlines-and-pad-layouts/but it's rather verbose for a beginner question.
Oddly, I have a (promotional?) card hanging on the wall of my cube with examples of the most common packages shrink-wrapped to it. I don't remember its title, and don't see a picture of one online, offhand. Hmm.
If it helps, SOT-23 is almost always SOT-23. Digikey is very good about collecting the various mfg-specific designations into the right package. The higher numbers and letters and gibberish designations tend to be the microscopic unsolderable packages, which you'll probably want to avoid as a beginner.
If all else fails, read the datasheet and check the dimensions. Designations don't mean a thing, what did they actually make?
And yes, shopping for, and footprinting, components is no easier as a professional. Welcome to the real world...
Tim